Beckstrom's law
In economics, Beckstrom's law is a model or theorem formulated by Rod Beckstrom. It purports to answer "the decades-old question of 'how valuable is a network'", and states in summary that "The value of a network equals the net value added to each user’s transactions conducted through that network, summed over all users." == Law == According to its creator, this law can be used to value any network be it social networks, computer networks, support groups and even the Internet as a whole.